/******************************************************************************
Copyright 2013-2014 Espressif Systems (Wuxi)
FileName: hw_timer.c
Description: hw_timer driver
Modification history:
2014/5/1, v1.0 create this file.
*******************************************************************************/
//#include "c-types.h"
typedef __SIZE_TYPE__ size_t;
#include "ets_sys.h"
#include "os_type.h"
#include "osapi.h"
#include "hw_timer.h"
/******************************************************************************
@brief disable this timer.
@param null
@return null
****************************************************************************/
void hw_timer_disarm(void)
{
ETS_FRC1_INTR_DISABLE();
TM1_EDGE_INT_DISABLE();
RTC_REG_WRITE(FRC1_CTRL_ADDRESS, 0);
}
/******************************************************************************
FunctionName : hw_timer_arm
Description : set a trigger timer delay for this timer.
Parameters : uint32 val :
in autoload mode
50 ~ 0x7fffff; for FRC1 source.
100 ~ 0x7fffff; for NMI source.
in non autoload mode:
10 ~ 0x7fffff;
Returns : NONE
*******************************************************************************/
void hw_timer_arm(u32 val)
{
RTC_REG_WRITE(FRC1_LOAD_ADDRESS, US_TO_RTC_TIMER_TICKS(val));
}
static void (* user_hw_timer_cb)(void) = NULL;
/******************************************************************************
FunctionName : hw_timer_set_func
Description : set the func, when trigger timer is up.
Parameters : void (* user_hw_timer_cb_set)(void):
timer callback function,
Returns : NONE
*******************************************************************************/
void hw_timer_set_func(void (* user_hw_timer_cb_set)(void))
{
user_hw_timer_cb = user_hw_timer_cb_set;
}
static void hw_timer_isr_cb(void)
{
if (user_hw_timer_cb != NULL) {
(*(user_hw_timer_cb))();
}
}
/******************************************************************************
FunctionName : hw_timer_init
Description : initilize the hardware isr timer
Parameters :
FRC1_TIMER_SOURCE_TYPE source_type:
FRC1_SOURCE, timer use frc1 isr as isr source.
NMI_SOURCE, timer use nmi isr as isr source.
u8 req:
0, not autoload,
1, autoload mode,
Returns : NONE
*******************************************************************************/
void ICACHE_FLASH_ATTR hw_timer_init(FRC1_TIMER_SOURCE_TYPE source_type, u8 req)
{
if (req == 1) {
RTC_REG_WRITE(FRC1_CTRL_ADDRESS,
FRC1_AUTO_LOAD | DIVDED_BY_16 | FRC1_ENABLE_TIMER | TM_EDGE_INT);
} else {
RTC_REG_WRITE(FRC1_CTRL_ADDRESS,
DIVDED_BY_16 | FRC1_ENABLE_TIMER | TM_EDGE_INT);
}
if (source_type == NMI_SOURCE) {
ETS_FRC_TIMER1_NMI_INTR_ATTACH(hw_timer_isr_cb);
} else {
ETS_FRC_TIMER1_INTR_ATTACH(hw_timer_isr_cb, NULL);
}
TM1_EDGE_INT_ENABLE();
ETS_FRC1_INTR_ENABLE();
}
//-------------------------------Test Code Below--------------------------------------
#if 0
void hw_test_timer_cb(void)
{
static uint16 j = 0;
j++;
if ((WDEV_NOW() - tick_now2) >= 1000000) {
static u32 idx = 1;
tick_now2 = WDEV_NOW();
os_printf("b%u:%d\n", idx++, j);
j = 0;
}
//hw_timer_arm(50);
}
void ICACHE_RAM_ATTR user_init(void)
{
hw_timer_init(FRC1_SOURCE, 1);
hw_timer_set_func(hw_test_timer_cb);
hw_timer_arm(100);
}
#endif
/*
NOTE:
1 if use nmi source, for autoload timer , the timer setting val can't be less than 100.
2 if use nmi source, this timer has highest priority, can interrupt other isr.
3 if use frc1 source, this timer can't interrupt other isr.
*/